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To evaluate the severity of airway pathologies, quantitative dimensioning of airways is of utmost importance. Endoscopic vision gives a projective image and thus no true scaling information can be directly deduced from it. In this article, an approach based on an interferometric setup, a low coherence laser source and a standard rigid endoscope is presented, and applied to hollow samples measurements. More generally, the use of the low coherence interferometric setup detailed here could be extended to any other endoscopy-related field of interest, e.g. gastroscopy, arthroscopy and other medical or industrial applications where tri-dimensional topology is required. The setup design with a multiple fibers illumination system is presented. Demonstration of the method ability to operate on biological samples is assessed through measurements on pig bronchi.
Tobias Kippenberg, Nicolas Volet, Martin Hubert Peter Pfeiffer
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